package com.cn.wanxi.model;

public class HelloWorld {
    // TODO: 2023/2/21 睡觉
    public static void main(String[] args) {
        System.out.println(666);
        System.out.println(666.11);
        System.out.println('1');
        System.out.println('@');
        System.out.println('$');
        System.out.println('a');
        System.out.println("aa");
        System.out.println(true);
        System.out.println(false);
//        System.out.println(null);
    }

}
